*{
    margin: 0px;
    padding: 0px;
}
div.center{
    height: 800px;
    /* background-color: white; */
    margin: 0 auto;
    width: 750px;
}
div.header_nav{
    width: 750px;
    height: 55px;
    background-color:rgb(245, 245, 245);
    margin: 0 auto;
    line-height: 55px;
    color: #636363;
    position: fixed;
    top: 0px;
}
div.header_nav>span:first-child{
    padding-right: 290px;
    text-align: center;
}
div.header_nav>span:last-child{
    font-size: 23px;
    color: #333;
}
header{
    width: 750px;
    height: 154px;
    background-color:rgb(245, 245, 245) ;
    margin: 0 auto;
    margin-top: 75px;
}
header div.header_top{
    width: 750px;
    height: 46px;
}
header div.header_center{
    width: 750px;
    height: 56.6px;
    background-color: #e3e4e6;
    display: flex;
}
div.search{
    width: 680px;
    height: 40px;
    background-color: #fff;
    border: 1px solid white;
    border-radius: 20px;
    margin: auto;
    line-height: 40px;
    display: flex;
}
div.header_center input{
    width: 500px;
    height: 25px;
    border: none;
    line-height: 35px;
    /* float: left; */
    margin: auto;
    text-align: left;
    margin-left: 0px;
}
div.search span{
    float: left;
    color: gray;
    padding-left: 10px;
}
div.header_bottom{
    height: 100px;
    background-color: white;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding: 0px;
}
div.header_bottom div{
    height: 83px;
    flex: 1;
    border-right: 1px solid #cccccc;
    line-height: 1px;
    text-align: center;
    padding: 8px 0;
}
div.header_bottom>div>section:first-child{
    padding-bottom: 8px;
}
article{
    width: 750px;
    height: 640px;
    margin: 0 auto;
    background-color: white;
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
article div.article_center{
    height: 500px;
    background-color: white;
    flex: initial;
}
article div.article_top{
    height: 86px;
    flex: initial;
}
article div.article_bottom{
    height: 40px;
    flex: initial;
}
article div.article_top img{
    padding: 8px;
    float: left;
}
article div.article_top>p:last-child>span:first-child{
    color: #f46200;
    font-size: 21px;
    display: inline-block;
    padding-top: 13px;
    padding-bottom: 3px;
}
article div.article_top>p:last-child>span:nth-child(2){
    color: #f46200;
    font-weight: 500px;
    font-size: 23px;
}
article div.article_top>p:last-child>span:nth-child(4){
    color: #747070;
    font-size: 14px;
}
article div.article_center{
    padding: 10px;
    color: #333;
    font-size: 22px;
}
article div.article_center div.article_images{
    height: 400px;
    width: 400px;
    display: flex;
    /* flex-direction: row; */
    justify-content: space-between;
}
article div.article_center div.article_images>div{
    width: 128px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
article div.article_center div.article_images>div>div{
    height: 128px;
    background-color: darkgoldenrod;
}
article div.article_bottom{
    display: flex;
    flex-direction: row;
}
article div.article_bottom div{
    flex: 1;
    border: 1px solid rgb(194, 191, 191);
    display: flex;
}
article div.article_bottom div span{
    margin: auto;
    color: grey;
}
footer{
    width: 750px;
    height: 55px;
    background-color: white;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    position: sticky;
    bottom: 0px;
}
footer div{
    border: 1px solid rgb(194, 191, 191);
    flex: 1;
}
footer div>span{
    display: block;
    text-align: center;
    line-height: 25px;
    color:#636363;
}









